一个自行设计信号灯的程序框架，通过修改源码（很简单，文中有极详细的中文注释），可以选择灯的颜色、大小、闪烁速度。-lights a self-designed framework of the procedure, by modifying source (very simple, the text is very detailed notes in Chinese), the lights can choose the color, size, speed flicker.